According to David Palmer's 2006 book, Parent's Guide to IQ Testing and Gifted Education, the average score for customary intelligence tests is 100 with a standard deviation of 15; approximately 50% of the population will score between 90 and 109 on a modern IQ test.
How long the decomposition of compostable plates takes is a question that many people might ask, and several factors influence what the answer is. Generally, if a compostable plate is placed in a commercial compost facility, it will take less than 180 days to completely decompose.
But the shocking fact is that if glass is thrown away in landfills, it takes million years to decompose. And according to some sources, it doesnât decompose at all. Paper Waste. Based on volume, paper the largest element in American landfills. Normally, it takes 2-6 weeks in landfills to get completely decomposed.